﴿ فَإِن كَذَّبُوكَ فَقَدْ كُذِّبَ رُسُلٌۭ مِّن قَبْلِكَ جَآءُو بِٱلْبَيِّنَٰتِ وَٱلزُّبُرِ وَٱلْكِتَٰبِ ٱلْمُنِيرِ ﴾

“And if they give thee the lie - even so, before thy time, have [other] apostles been given the lie when they came with all evidence of the truth, and with books of divine wisdom, and with light-giving revelation.”

When they replied that their fathers never killed any prophet wrongfully, Allah said: (And if they deny thee) O Muhammad regarding what you say to them, do not be saddened, (even so did they deny messengers who were before you) their people denied them, (who came with miracles) with commands and prohibitions and signs of prophethood (and with the Psalms) and with the news relating to the Scriptures of past nations (and with the Scripture giving light) showing the lawful and the prohibited.